Inventor

Takeo Kudo

Inventor

Nishinomiya, JP

Overview

1982–1995

Patent span

Chemistry

Primary field (CPC C)

Patents· 14 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C22Cprimary

C22CAlloys43%

E21BEarth or rock drilling17%

G03GElectrography13%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%

C08JWorking-up4%

C08LCompositions of macromolecular compounds4%

C21DModifying the physical structure of ferrous metals4%

F28FDetails of heat-exchange and heat-transfer apparatus, of general application4%

PatentTitleYear

5,378,427'Corrosion-resistant alloy heat transfer tubes for heat-recovery boilers'1995 5,284,530'Duplex stainless steel having improved corrosion resistance'1994 5,066,560'Process for producing toner for electrophotography'1991 4,983,488'Process for producing toner for electrophotography'1991 4,910,114'Toner for electrophotography'1990 4,770,703'Sintered stainless steel and production process therefor'1988 4,652,315'Precipitation-hardening nickel-base alloy and method of producing same'1987 4,581,202'Sintered stainless steel and production process therefor'1986 4,421,571'Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking'1983 4,400,209'Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking'1983 4,400,210'Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking'1983 4,400,211'Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking'1983 4,400,349'Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking'1983 4,351,910'Expandable styrene series resin composition and process for production thereof'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1991Patents assigned to HITACHI CHEMICAL CO LTD (4)· patent assignee history

1982–1991Based in Hitachi, JP· patent location history

1983–1995Patents assigned to SUMITOMO METAL IND (10)· patent assignee history

1983Based in Suita, JP· patent location history

1986–1995Based in Nishinomiya, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SUMITOMO METAL IND	10	1983–1995
HITACHI CHEMICAL CO LTD	4	1982–1991

Locations

Location	Patents	Span
Nishinomiya, JP	5	1986–1995
Suita, JP	5	1983
Hitachi, JP	4	1982–1991